Windows Live Messenger After Windows update

Icon appears on task bar, opening messenger causes error message:

"Windows Live Messenger stopped working"

Log Name: Application
Source: Application Error
Date: 12/18/2009 11:00:38 AM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: Fred2
Description:
Faulting application name: msnmsgr.exe, version: 14.0.8089.726, time stamp:
0x4a6ce533
Faulting module name: WLDCore.dll, version: 14.0.8089.726, time stamp:
0x4a6ce514
Exception code: 0xc0000005
Fault offset: 0x00002ee5
Faulting process id: 0x1f80
Faulting application start time: 0x01ca7ffae8d9eadf
Faulting application path: C:\Program Files\Windows Live\Messenger\msnmsgr.exe
Faulting module path: C:\Program Files\Windows Live\Messenger\WLDCore.dll
Report Id: 7b75dc58-ebee-11de-8db9-001372227f0b
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Application Error" />
<EventID Qualifiers="0">1000</EventID>
<Level>2</Level>
<Task>100</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2009-12-18T16:00:38.000000000Z" />
<EventRecordID>214449</EventRecordID>
<Channel>Application</Channel>
<Computer>Fred2</Computer>
<Security />
</System>
<EventData>
<Data>msnmsgr.exe</Data>
<Data>14.0.8089.726</Data>
<Data>4a6ce533</Data>
<Data>WLDCore.dll</Data>
<Data>14.0.8089.726</Data>
<Data>4a6ce514</Data>
<Data>c0000005</Data>
<Data>00002ee5</Data>
<Data>1f80</Data>
<Data>01ca7ffae8d9eadf</Data>
<Data>C:\Program Files\Windows Live\Messenger\msnmsgr.exe</Data>
<Data>C:\Program Files\Windows Live\Messenger\WLDCore.dll</Data>
<Data>7b75dc58-ebee-11de-8db9-001372227f0b</Data>
</EventData>
</Event>